Rapid Air technology is the name that Philips gave to the RUSH technology that was developed by APDS Development during the development of the Airfryer. RUSH stands for Radiant and UpStream Heating, which tells us something about the way heat is transferred. Distinctive about the technology is that heat is transferred with very high intensity, that heat is distributed over the food from all sides and that the heat can penetrate through a thick pile of food particles.